Green’s Dictionary of Slang

charge v.3

(N.Z. prison)

to carry contraband, e.g. drugs, in the rectum or vagina, thus charged (up), carrying such contraband, charging smuggling such contraband into prison.

[NZ]D. Looser ‘Boob Jargon’ in NZEJ 13 28: chargev. To insert illegal contraband into one's rectum / vagina.
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 40/2: charged adj. charged (also charged up) carrying contraband in one’s rectum or vagina.
[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 40/2: charging n. the act of smuggling drugs into prison.

In derivatives

charger (n.)

a small container than can be filled with contraband and then inserted into the rectum or vagaina for smuggling purposes.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 40/2: charger n. a small container, usually made of plastic, that an inmate may use to hold contraband concealed in the rectum or vagina.